Flammable liquids: categories, storage and separation

0:00 Intro

106, for the ASP exam. Every rule and number here is cited to its primary source, on screen. In this lesson, you'll learn to: classify a liquid into Category 1 through 4 by flashpoint and boiling point, state the container, cabinet and inside storage room limits, apply outdoor storage and tank separation distances, and know the transfer, grounding and ventilation rules.

0:36 Definitions · 1910.106(a)(19)

4 °F. 4 °F, boiling point at or below 95 °F. Category 2: same flashpoint, boiling point above 95 °F. 4 to 140 °F. 4 °F. Heating changes handling. Category 3 at or above 100 °F, heated to within 30 °F of flashpoint, is handled as Category 3 below 100 °F.

1:10 Definitions · heated liquids

Category 4 heated to within 30 °F of flashpoint is handled as Category 3 at or above 100 °F. 4 °F flashpoint, heated within 30 °F: handle as Category 4. Table H-12 caps container size by type and category. Glass or approved plastic: 1 pint Category 1, 1 quart Category 2, 1 gallon for 3 and 4.

1:43 Containers · Table H-12

Metal (other than DOT drums): 1 gallon Category 1, 5 gallons for 2, 3 and 4. Safety cans: 2 gallons Category 1, 5 for the rest. DOT metal drums 60; portable tanks 660. Cabinets have a capacity cap and a fire test. At most 60 gallons of Category 1, 2 or 3, or 120 gallons of Category 4. In a 10-minute fire test, inside temperature stays at or below 325 °F; joints stay tight, door stays closed.

2:18 Storage cabinets · (d)(3)

” Deemed-compliant metal cabinets: three-point lock, sill at least 2 inches. Inside rooms have rating, size and quantity limits. A 2-hour room up to 500 square feet: 10 gallons per square foot with fire protection, 5 without.

2:50 Inside storage rooms · Table H-13

A 1-hour room up to 150 square feet: 4 with protection, 2 without. Openings need liquid-tight sills or ramps at least 4 inches high, a floor 4 inches lower, or a draining open-grated trench; self-closing fire doors. At least six air changes per hour; one clear aisle at least 3 feet wide. Outdoor storage has quantity, distance and curb rules.

3:29 Storage outside buildings · (d)(6), (d)(7)

Up to 1,100 gallons may sit adjacent to buildings on the same premises and management. Over 1,100 gallons, or conditions unmet: 10 feet from buildings to the nearest container. Grade away from buildings, or use a curb at least 6 inches high. A 12-B extinguisher: within 10 feet of a storage room door, or 10 to 25 feet from Category 1, 2 or 3 storage outside a room but inside a building.

4:06 Tank separation · (b)(2)

Aboveground tanks need a 3-foot floor plus a diameter formula. Generally one-sixth the sum of diameters, never under 3 feet. If one tank is under half the other's diameter: half the smaller diameter. Crude production tanks up to 126,000 gallons in noncongested areas: 3 feet. Unstable liquids: half the sum of diameters.

4:50 Industrial plants · 1910.106(e)

g. and for 125-gallon LPG beside 550-gallon fuel oil tanks. Paragraph (e) covers plants with incidental use or unit physical operations, not chemical plants, refineries or distilleries. Inside a building, transfer only by closed piping, safety cans, a top-drawing device, or gravity through an approved self-closing valve. Transfer by air pressure on the container or portable tank is prohibited. Category 1 or 2, or 3 below 100 °F: dispense into containers only if nozzle and container are electrically interconnected.

5:36 Common exam traps

Unit operations with those liquids: at least 1 cubic foot per minute per square foot of solid floor. Now, four traps that catch people on exam day.

6:06 Recap quiz

One: Categories 1 and 2 share a flashpoint range; boiling point separates them. Two: cabinets hold 60 gallons, or 120 for Category 4. Three: safety cans are 2 gallons for Category 1, 5 for others. Four: a 1-hour room is capped at 150 square feet, a 2-hour at 500. Question 1. Flashpoint 70 °F, boiling point 120 °F. Category? A: 1. B: 2. C: 3. D: 4. B. 4 °F flashpoint with a boiling point above 95 °F is Category 2. Question 2. Maximum cabinet capacity for Category 4? A: 60 gallons. B: 90 gallons. C: 120 gallons. D: 660 gallons. C. Category 4 cabinets may hold up to 120 gallons. Question 3. 1,500 gallons stored outdoors beside a building on the same premises. Minimum distance to nearest container? A: 5 feet. B: 10 feet. C: 25 feet. D: 50 feet. B. Over 1,100 gallons requires at least 10 feet. Want to see where you stand on every ASP domain? com.

25 questions, free, no card. You get a readiness score for each ASP domain.